Greetings, Access Novice here.

I have Line18 formatted as Visible = "NO" in Properties, and I want to make
it visible depending on the value of certain fields. Why doesn't this code
work when put in the "On Format" or "On Print" events of the Detail section?

If [Inventory Posting Group] = "RESALE" Then Line18.Visible = "YES"

BTW, I tried "TRUE" in place of "YES", and it still didn't work. TIA.